CISS scans (FA=35°; TR=12.78ms; TE=6.39ms; FOV=140mm; 384x384 acquisition matrix with voxel size 0.365mm x 0.365mm x 1.5mm) were acquired from the ongoing clinical trials of the “Bridge Enhanced ACL Repair” (BEAR) procedure (BEAR I Trial: NCT02292004, IRB-P00012985; BEAR II Trial, NCT02664545, IRB-P00021470).29 (link); 31 (link); 32 (link) All MRI scans were performed on a 3T TIM TRIO (Siemens; Erlangen, Germany) with a 15-channel transmit/receive knee coil (Siemens). For the BEAR I Trial, MR images of the surgical limb were acquired at 3, 6, 12, and 24 months post-surgery. For the BEAR II Trial, the MR images were acquired at 6, 12, and 24 months post-surgery. From this dataset, MRI scans were available at multiple timepoints for 76 BEAR subjects (238 MRI scans) and 45 ACLR subjects (120 MRI scans). These MRI scans were randomly divided by subject into 70% training (BEAR n=174, ACLR n=86), 20% validation (BEAR n=45, ACLR n=24), and 10% test sets (BEAR n=19, ACLR n=10).